function getCookie(name) {
    var r = document.cookie.match("\\b" + name + "=([^;]*)\\b");
    return r ? r[1] : undefined;
}


$(function(){

    // 打开登录框
    $('.comment_form_logout').click(function () {
        $('.login_form_con').show();
    })

    // 收藏
    $(".collection").click(function () {
        // 1.准备参数
        var params = {
            "news_id": $(this).attr("data-newsid"),
            "action": "collect"
        };
        $.ajax({
            url:'/news_collect',
            type:'post',
            contentType:'application/json',
            data: JSON.stringify(params),
            headers:{
                'X-CSRFToken': getCookie('csrf_token')
            },
            success:function (resp) {
                if(resp.errno == '0'){
                    // 隐藏收藏按钮
                    $(".collection").hide();
                    // 显示已收藏
                    $(".collected").show()
                }else if (resp.errno == '4101'){
                    $('.login_form_con').show()
                }else {
                    alert(resp.errmsg)
                }
            }
        })
       
    })

    // 取消收藏
    $(".collected").click(function () {
        var params = {
            "news_id":$(this).attr("data-newsid"),
            "action":"cancel_collect"
        }
        $.ajax({
            url:"/news_collect",
            type:"post",
            contentType:"application/json",
            data:JSON.stringify(params),
            headers:{
                'X-CSRFToken':getCookie("csrf_token")
            },
            success:function(resp){
                if (resp.errno == "0") {
                    // 收藏成功
                    // 隐藏收藏按钮
                    $(".collection").show();
                    // 显示取消收藏按钮
                    $(".collected").hide();
                }else if (resp.errno == "4101"){
                    $('.login_form_con').show();
                }else{
                    alert(resp.errmsg);
                }
            }

        })

    })

        // 评论提交
    $(".comment_form").submit(function (e) {
        e.preventDefault();
        var news_id = $(this).attr('data-newsid')
        var news_comment = $(".comment_input").val();

        if (!news_comment) {
            alert('请输入评论内容');
            return
        }
        var params = {
            "news_id": news_id,
            "comment": news_comment
        };
        $.ajax({
            url: "/news_comment",
            type: "post",
            contentType: "application/json",
            headers: {
                "X-CSRFToken": getCookie("csrf_token")
            },
            data: JSON.stringify(params),
            success: function (resp) {
                if (resp.errno == '0') {
                    var comment = resp.data;
                    // 拼接内容
                    var comment_html = '';
                    comment_html += '<div class="comment_list">';
                    comment_html += '<div class="person_pic fl">';
                    if (comment.user.avatar_url) {
                        comment_html += '<img src="' + comment.user.avatar_url + '" alt="用户图标">'
                    }else {
                        comment_html += '<img src="../../static/news/images/person01.png" alt="用户图标">'
                    }
                    comment_html += '</div>';
                    comment_html += '<div class="user_name fl">' + comment.user.nick_name + '</div>';
                    comment_html += '<div class="comment_text fl">';
                    comment_html += comment.content;
                    comment_html += '</div>';
                    comment_html += '<div class="comment_time fl">' + comment.create_time + '</div>';

                    comment_html += '<a href="javascript:;" class="comment_up fr" data-commentid="' + comment.id + '" data-newsid="' + comment.news_id + '">赞</a>';
                    comment_html += '<a href="javascript:;" class="comment_reply fr">回复</a>';
                    comment_html += '<form class="reply_form fl" data-commentid="' + comment.id + '" data-newsid="' + news_id + '">';
                    comment_html += '<textarea class="reply_input"></textarea>';
                    comment_html += '<input type="button" value="回复" class="reply_sub fr">';
                    comment_html += '<input type="reset" name="" value="取消" class="reply_cancel fr">';
                    comment_html += '</form>';

                    comment_html += '</div>';
                    // 拼接到内容的前面
                    $(".comment_list_con").prepend(comment_html);
                    // 让comment_sub 失去焦点
                    $('.comment_sub').blur();
                    // 清空输入框内容
                    $(".comment_input").val("")
                    updatecommentcount()
                }else {
                    alert(resp.errmsg)
                }
            }
        })
    })

    $('.comment_list_con').delegate('a,input','click',function() {

        var sHandler = $(this).prop('class');
        // 点击回复显示表单域
        if (sHandler.indexOf('comment_reply') >= 0) {
            $(this).next().toggle();
        }
        // 点击取消隐藏表单域
        if (sHandler.indexOf('reply_cancel') >= 0) {
            $(this).parent().toggle();
        }
        // 点击点赞按钮
        if (sHandler.indexOf('comment_up') >= 0) {
            var $this = $(this);
            var action = 'add';
            if (sHandler.indexOf('has_comment_up') >= 0)
            {
                // 如果当前该评论已经是点赞状态，再次点击会进行到此代码块内，代表要取消点赞
                action = 'remove'
            }

            // 1.准备提交给后端的参数
            var comment_id = $(this).attr('data-commentid')
            var news_id = $(this).attr('data-newsid')
            var params = {
                'comment_id': comment_id,
                'news_id': news_id,
                'action': action
            }

            // 2.使用ajax进行前后端通信
            $.ajax({
                url: '/comment_like',
                type: 'post',
                data: JSON.stringify(params),
                contentType: 'application/json',
                headers: {
                    'X-CSRFToken': getCookie('csrf_token')
                },
                success:function (resp) {
                    if(resp.errno == '0'){
                        var like_count = $this.attr('data-likecount')
                        if(action == 'add')
                        {
                            like_count += 1
                            // 点赞逻辑
                            $this.addClass('has_comment_up')
                        }else
                        {
                            like_count -= 1
                            // 取消点赞
                            $this.removeClass('has_comment_up')
                        }
                         // 更新点赞数据
                        $this.attr('data-likecount', like_count)
                        if (like_count == 0) {
                            $this.html("赞")
                        }else {
                            $this.html(like_count)
                        }

                    }else if (resp.errno == '4101')
                    {
                        $('.login_form_con').show()
                    }else
                    {
                        alert(resp.errmsg)
                    }
                }
            })
        }
        // 点击回复所要进行的业务逻辑
        if (sHandler.indexOf('reply_sub') >= 0) {
            var $this = $(this);
            var news_id = $this.parent().attr("data-newsid")
            var parent_id = $this.parent().attr("data-commentid")
            var comment = $this.prev().val()

            if (!comment) {
                alert('请输入评论内容')
                return
            }

            var params = {
                "news_id": news_id,
                "comment": comment,
                "parent_id": parent_id
            }
            $.ajax({
                url: "/news_comment",
                type: "post",
                contentType: "application/json",
                headers: {
                    "X-CSRFToken": getCookie("csrf_token")
                },
                data: JSON.stringify(params),
                success: function (resp) {
                    if (resp.errno == "0") {
                        var comment = resp.data
                        // 拼接内容
                        var comment_html = ""
                        comment_html += '<div class="comment_list">'
                        comment_html += '<div class="person_pic fl">'
                        if (comment.user.avatar_url) {
                            comment_html += '<img src="' + comment.user.avatar_url + '" alt="用户图标">'
                        } else {
                            comment_html += '<img src="../../static/news/images/person01.png" alt="用户图标">'
                        }
                        comment_html += '</div>'
                        comment_html += '<div class="user_name fl">' + comment.user.nick_name + '</div>'
                        comment_html += '<div class="comment_text fl">'
                        comment_html += comment.content
                        comment_html += '</div>'
                        comment_html += '<div class="reply_text_con fl">'
                        comment_html += '<div class="user_name2">' + comment.parent.user.nick_name + '</div>'
                        comment_html += '<div class="reply_text">'
                        comment_html += comment.parent.content
                        comment_html += '</div>'
                        comment_html += '</div>'
                        comment_html += '<div class="comment_time fl">' + comment.create_time + '</div>'

                        comment_html += '<a href="javascript:;" class="comment_up fr" data-commentid="' + comment.id + '" data-newsid="' + comment.news_id + '">赞</a>'
                        comment_html += '<a href="javascript:;" class="comment_reply fr">回复</a>'
                        comment_html += '<form class="reply_form fl" data-commentid="' + comment.id + '" data-newsid="' + news_id + '">'
                        comment_html += '<textarea class="reply_input"></textarea>'
                        comment_html += '<input type="button" value="回复" class="reply_sub fr">'
                        comment_html += '<input type="reset" name="" value="取消" class="reply_cancel fr">'
                        comment_html += '</form>'

                        comment_html += '</div>'
                        $(".comment_list_con").prepend(comment_html)
                        // 请空输入框
                        $this.prev().val('')
                        // 关闭
                        $this.parent().hide()
                        updatecommentcount()
                    } else {
                        alert(resp.errmsg)
                    }
                }
            })
        }
    })

        // 关注当前新闻作者
    $(".focus").click(function () {

    })

    // 取消关注当前新闻作者
    $(".focused").click(function () {

    })
})

// 每次提交评论后调用此函数
function updatecommentcount() {
    var length = $(".comment_list").length
    $(".comment_count").html(length + "条评论")
}
